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RE: cannot find bounds of function error
- From: vijay nag <vijunag at gmail dot com>
- To: gdb at sourceware dot org
- Date: Wed, 24 Jul 2013 15:14:15 +0530
- Subject: RE: cannot find bounds of function error
Hello gdb-veterans,
My latest gdb-7.5 barfs out "cannot find bounds of current function"
error when it encounters GNU_IFUNC while executing one line of code at
a time
using "next" command
(gdb) n
224 if (1==fscanf(rva, "%d", &val)) {
(gdb) n
225 if (val) {
(gdb) n
237 fclose(rva);
(gdb) n
242 } else if (val) {
(gdb) n
252 if (getenv("ARGV0")) {
(gdb) n
256 init(argc, argv,
(gdb) n
268 priv_init();
(gdb) n
273 config.argv0short = strrchr(argv[0], '/');
(gdb) p &strrchr
$1 = (<text gnu-indirect-function variable, no debug info> *)
0x13b1b600 <strrchr>
(gdb) n
0x08048430 in ?? ()
(gdb) n
Cannot find bounds of current function
(gdb) n
Cannot find bounds of current function
(gdb) n
Cannot find bounds of current function
(gdb) n
Cannot find bounds of current function
(gdb) n
Cannot find bounds of current function
(gdb)
The corresponding assembly before strrchr func here is as below
0x122b6ca7 <main+498> mov 0xc(%ebp),%ebx
â
â0x122b6caa <main+501> movl $0x2f,0x4(%esp)
â
â0x122b6cb2 <main+509> mov (%ebx),%eax
â
â0x122b6cb4 <main+511> mov %eax,(%esp)
â
â0x122b6cb7 <main+514> call 0x8048430
Here 0x8048430 appears to be a call to PLT and entry for strrchr seems
to be resolved already
(gdb) p /x *0x178ff5d8
$3 = 0x13b3b0d0
(gdb) info line *0x13b3b0d0
Line 42 of "../sysdeps/i386/i686/multiarch/strrchr-sse2-bsf.S" starts
at address 0x13b3b0d0 <__strrchr_sse2_bsf> and ends at 0x13b3b0d4
<__strrchr_sse2_bsf+4>.
(gdb)